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3 years ago

Find the mean (average) of each set of numbers. Round your answer to the nearest tenth 12 18 5 8 15 2 9 17 1

Mathematics

2 answers:

umka2103 [35]3 years ago

8 0

Answer: 9.7

Step-by-step explanation:

labwork [276]3 years ago

6 0

Answer:

12+18+5+15+2+9+17+1=87

87 divided by 9 equals 9.67

Step-by-step explanation: It's like average so you find the sum of the numbers and divide by the total numbers you're given

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2 years ago

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3. Suppose you are testing H0 : µ = 20 vs H1 : µ > 20. The sample is large (n = 71) and the variance, σ 2 , is known. (a) Fin

LUCKY_DIMON [66]

Answer:

We reject the null hypothesis.

Step-by-step explanation:

We are given the following information in the question:

Sample size, n = 71

Population variance is known.

Level of significance, α = 0.08

$z_{\text{stat}} = 1.56$

The null and alternate hypothesis are:

$H_{0}: \mu = 20\\H_A: \mu > 20$

We use one-tailed z test to perform this hypothesis.

Formula:

$z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} } = 1.56$

Now, $z_{critical} \text{ at 0.08 level of significance } = 1.41$

Since,

$z_{stat} > z_{critical}$

We fail to accept the null hypothesis and reject it and accept the alternate hypothesis.

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3 years ago

What is. 3/4x - 2/3x - 4 = 1/6x- 7 I give Brainliest!

drek231 [11]

Answer:

Step-by-step explanation:

$\frac{3}{4} x - \frac{2}{3} x - 4 = \frac{1}{6} x - 7$

$= > \frac{3}{4} x - \frac{2}{3} x - \frac{1}{6} x = 4 - 7$

$= > \frac{9x - 8x - 2x}{12} = - 3$

$= > \frac{ - 1}{12} x = - 3$

$= > x = - 3 \times ( - 12)$

=> x = 36 (Ans)

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2 years ago

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